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Viruses are considered to be non-living and because they are not alive, they can not reproduce. A better term is to replicate or make a copy of themselves. It is like using a copy machine.
Viruses are microscopic parasites, generally much smaller than bacteria.
They lack the capacity to thrive and reproduce outside of a host body.
The polio virus, 30 nm across, is about 10,000 times smaller than a grain of salt. Such differences in size between viruses and bacteria provided the critical first clue of the former’s existence.
They have a protein coat and RNA or DNA, not both.

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9y ago

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